Wilczek, Hans von, Austrian explorer (1837-1922). 2 ALS ("Wilczek").
Vienna and Seebarn Castle (NÖ), 1917 and 1920.
8vo. Altogether (1½+1½=) 3 pp. on 2 ff.
€ 200.00
To the geologist Franz Heger (1853-1931), apologizing for not having answered a letter, and about a shortage of heating material.